Audio3 Warbler Manual

Free-fi eld audiometer

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

Manual

v1.10

Audio

W a r b l e r

Free-ﬁ eld Audiometer

Table of Contents

Need help?

Do you have a question about the Warbler and is the answer not in the manual?

Questions and answers

Summary of Contents for Audio3 Warbler

Page 1 Manual v1.10 Audio W a r b l e r Free-ﬁ eld Audiometer...
Page 2: Table Of Contents
Contents Welcome Contents ..............2 Thank you for purchasing the Audio3 Warbler free-ﬁ eld audiometer. We believe it is one of the ﬁ nest audiometric devices available and hope you Welcome ..............3 will enjoy using it. In the Box ..............4 Safety ...............5 Audio3 is owned and operated by hearing research scientists who study User Interface Overview................6...
Page 3: In The Box
<500mA output to charge the Warbler, use of another charger could damage the device. During periods of non-use, store the Warbler in a cool (< 30 °C), dry place (< 50 % humidity). It should be charged at least once a year to retain its calibration information and to help extend the battery’s lifespan.
Page 4: User Interface Overview
User Interface Overview Charging the Battery Before using the Warbler, charge its battery using the included charger. It takes 3.5mm headphone jack several hours to recharge. Th e included charger has a microprocessor to correctly (headphone audiometry) charge the battery, the status of the charger is indicated by its LED indicators: Table 1 Charger Status LEDs 3.5mm auxiliary source...
Page 5: Checking Warbler On Arrival
On arrival, charge Warbler by pluggin it into an approved 12v Lead acid battery Th e Warbler is provided with a hood (optional). Th e hood is designed to hide the charger as decribed in the previous “Charging the Battery” section. Take this operator’s hand movements in order to remove any potential visual cues related to...
Page 6: The Display
(future release) qualitative frequency content bargraph of the selected On the main page, the Warbler’s LCD displays the sound level (dB HL when dB is sound (e.g. locations of formant peaks for Ling sounds) shown or dBAmax). If the frequency is changed the new frequency is briefl y (1s) displayed on the main page.
Page 7: Operating The Warbler
Switching on and off Changing the Stimuli To turn the Warbler on push the centre selector knob and release. To turn the From the main LEVEL page, rotate the centre selection knob to display and select Warbler off press and release again.
Page 8: User Controls Flow Diagram
User Controls Flow Diagram To calibrate, first select desired trans- OUTPUT ducer, then hold both toggles up while releasing knob. Phones/Spkr Auto-Off CALIBRATE (8 min) Level Frequency Sound Adjustments Adjustments Adjustments FREQ LEVEL SOUND +/- Hz +/- dB Type Auto Auto (1s) STEPSIZE...
Page 9: Overview Of Stimuli
Tone stimuli are designed to be used for standard headphone audiometry. skill extends to selecting the appropriate stimuli for the situation. For example, Audio3 does not recommend using Tones with the loudspeaker as this can free-fi eld audiometry may be required for children who are too young to wear...
Page 10: Warbletone & Freshnoise
FM modulation while Freshnoise generates its frequency content as a continuous narrow-band noise. In the Audio3 Warbler, these stimuli share the same frequency spectra and the same cal- ibrated levels. You will get a consistent result whether using Warbletone or Freshnoise and these stimuli are considered interchangeable.
Page 11: Sounds
Sounds Sounds Environmental sounds are designed to be used as free-fi eld or diff use-fi eld Cork Pop Cat Purr non-audiometric stimuli over the loudspeaker for engaging attention. Th ese stimuli have a range of frequency spectra. Th ey are calibrated to maximum dBA sound pressure levels.
Page 12: Ling Sounds
Ling sounds Ling sounds Ling speech sounds are designed to be used as free-fi eld or diff use-fi eld non-audiometric stimuli over the loudspeaker. Th ey are used for speech sound discrimination (3 vowels and 2 consonants). Th ese stimuli have a range of frequency spectra.
Page 13: Songs
Songs Songs Songs are designed to be used as free-fi eld or diff use-fi eld non-audiomet- ric stimuli over the loudspeaker. Th e songs are band-limited as described in the table below. Th e frequency toggle switch selects the band. Table 8 Song Stimuli Types Song Twinkle Twinkle...
Page 14: Scale
Scale Scale Th e chromatic scale stimulus is designed to be used as a demo stimu- lus over the loudspeaker or headphones. It demonstrates the eff ect that band-limiting a complex tone (comprised of several harmonics) can have on its pitch. When the scale is band-limited only the harmonics that are within the band are heard and, for some notes, these may not include the fundamental frequency or enough harmonics to decode the intended pitch.
Page 15: Calibration Overview
Scale dBAmax Note: If the Warbler’s tone detuning option is used, those frequencies will not be accurately calibrated. So not use the AM modulation during calibration or the correct calibration will not be achieved. Audiometric signals are calibrated in dB HL because these signals have been validated using a standard reference group of young adults.
Page 16: Calibration Charts
Adjust Calibration 70.0 11.0 81.0 (7) Once you have calibrated all sounds and 70.0 76.0 frequencies, turn off the warbler to fi nalize the cal- ibration by pressing and releasing the centre knob. 1000 70.0 75.5 End Calibration 1500 70.0 75.5...
Page 17: Technical Specifi Cations
Acoustic Resolution +/- 0.5 dB 700 hPa MADE IN LONDON, UK Acoustic Calibrated Accuracy +/- 2.0 dB Linearity 0.02% Figure 11 Sample Warbler Underside Label THD+N 0.005% Headphone Impedance Range > 16 Ω Table 15 Regulatory Symbols Enclosure Material Wood...
Page 18: Recycling
LTE Band 5 Guidelines and manufacturer’s declaration - Electromagnetic emissions (EN55011:2009+ A1:2010) 1720 GSM 1800 Warbler is intended for use in the electromagnetic environment specifi ed below. Th e user should ensure that the environment meets these minimum requirements. CDMA 1900 1845...
Page 19: Warranty / Service
Th is warranty entitles you to have the unit repaired or replaced free of charge, during the fi rst two years aft er purchase, at any authorised Audio3 distributor provided that it was originally purchased from an authorised dealer or distributor IEC60601-1-2:2014, EN60601-1-2:2015 parts radiated emissions, radiated and you completed product registration online (www.audio-3.com).
Page 20: Parts
Parts BS EN ISO 389-2:1997. Acoustics. Reference Zero for the Calibration of Audiometric Equipment. Part 2: Reference Equivalent Th reshold Sound Pressure Levels for Pure Tones and Insert Earphones. (Identical to ISO 389-2:1994.) BS EN ISO 389-4:1999. Acoustics. Reference Zero for the Calibration of Audiometric Equipment.